Simplify (7x)^9/(7x): Applying Exponent Division Rules

Exponent Division with Same Base Terms

Insert the corresponding expression:

(7×x)9(7×x)= \frac{\left(7\times x\right)^9}{\left(7\times x\right)}=

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Simply
00:03 Any number to the power of 1 equals itself
00:07 Let's use the formula for dividing powers
00:10 Any number (A) to the power of (N) divided by the same base (A) to the power of (M)
00:13 equals the number (A) to the power of the difference of exponents (M-N)
00:16 Let's use this formula in our exercise
00:51 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Insert the corresponding expression:

(7×x)9(7×x)= \frac{\left(7\times x\right)^9}{\left(7\times x\right)}=

2

Step-by-step solution

To solve the expression (7×x)9(7×x) \frac{(7\times x)^9}{(7\times x)} , we can utilize the Power of a Quotient Rule for exponents. According to this rule, for any non-zero number a a and integers m m and n n , the expression aman \frac{a^m}{a^n} can be simplified to amn a^{m-n} .

Applying this rule, we identify the base (7×x)(7\times x) as the variable and analyze the exponents:

  • The numerator is (7×x)9(7\times x)^9, which means the power 9 applies to the term (7×x)(7\times x).
  • The denominator is (7×x)1(7\times x)^1, which implies a power of 1.

Now, we apply the quotient rule:

(7×x)9(7×x)=(7×x)91=(7×x)8 \frac{(7\times x)^9}{(7\times x)} = (7\times x)^{9-1} = (7\times x)^8

Thus, the expression simplifies to (7×x)8 (7\times x)^8 . This is achieved by subtracting the exponent in the denominator from the exponent in the numerator.

The solution to the question is: (7×x)8 (7\times x)^8 .

3

Final Answer

(7×x)8 \left(7\times x\right)^8

Key Points to Remember

Essential concepts to master this topic
  • Quotient Rule: When dividing same bases, subtract the exponents
  • Technique: (7x)9(7x)1=(7x)91=(7x)8 \frac{(7x)^9}{(7x)^1} = (7x)^{9-1} = (7x)^8
  • Check: Expand both original and simplified forms to verify they're equal ✓

Common Mistakes

Avoid these frequent errors
  • Adding exponents instead of subtracting
    Don't add the exponents 9 + 1 = 10 when dividing! This gives (7x)10 (7x)^{10} which is completely wrong. Addition is for multiplication, not division. Always subtract the bottom exponent from the top exponent when the bases match.

Practice Quiz

Test your knowledge with interactive questions

\( 112^0=\text{?} \)

FAQ

Everything you need to know about this question

Why do we subtract exponents when dividing?

+

Think of it as canceling out repeated multiplication! a×a×aa \frac{a \times a \times a}{a} means two of the a's cancel out, leaving just one a. The exponent rule a31=a2 a^{3-1} = a^2 gives the same result faster.

What if the denominator doesn't have an exponent written?

+

Any number or variable without a written exponent has an implied exponent of 1. So (7x) (7x) is really (7x)1 (7x)^1 , which is why we subtract 1 from 9.

Can I use this rule with different bases?

+

No! The quotient rule only works when the bases are exactly the same. You can't simplify x5y3 \frac{x^5}{y^3} because the bases x and y are different.

What happens if the bottom exponent is bigger than the top?

+

You still subtract! For example, x3x7=x37=x4 \frac{x^3}{x^7} = x^{3-7} = x^{-4} . The negative exponent means 1x4 \frac{1}{x^4} .

How can I check if my answer is right?

+

Multiply your answer by the denominator - you should get the original numerator! For this problem: (7x)8×(7x)=(7x)8+1=(7x)9 (7x)^8 \times (7x) = (7x)^{8+1} = (7x)^9

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Exponents Rules questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations